Effect of irrigation intervals and nitrogen fertilizer levels on Rice yield in Guilan province
Subject Areas : Crop Production Research
1 - Associate Professor, Department of Agronomy and Plant breeding, Lahijan branch, Islamic Azad University, Lahijan, Iran
Keywords: Irrigation management, chlorophyll content, Hashemi cultivar ric ,
Abstract :
This research was conducted to investigate the effect of irrigation intervals and nitrogen fertilizer levels on Hashemi cultivar rice in Guilan province in 1400 and 1401. The experiment was conducted in the form of split plots in the form of a randomized complete block design in three replications. The treatments included irrigation intervals of 3 and 11 days as the main factor and nitrogen chemical fertilizer levels (from urea source) of 50, 100 and 150 kg/ha as secondary factors. The results of the research showed that the interaction effect of irrigation and nitrogen fertilizer at the level of 1% on yield, chlorophyll amount and number of tillering was significant and the highest yield was observed in the conditions of irrigation once in three days and with the consumption of 150 kg of nitrogen per hectare with an average of 5969 kg/ha and the maximum amount of chlorophyll was obtained as a result of the interaction of irrigation and fertilizer treatments, in the condition of irrigation once every eleven days and in the fertilizer treatment of 150 kg/ha, it was 41.4. The highest number of tillering per square meter was 594 in the condition of irrigation once every three days and with the consumption of 150 kg of nitrogen per hectare. According to the results and taking into account the yield, the condition of 3-day irrigation cycle and the consumption of nitrogen fertilizer at the rate of 150 kg/ha are recommended for the study area. According to the results and yield values, the condition of 3-day irrigation intervals and the consumption of nitrogen fertilizer at the rate of 150 kg/ha are recommended for the study area.